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    Re: Hughes Tables.
    From: Dave Walden
    Date: 2009 Jul 16, 23:38 -0700

    According to my Hughes, in your earlier post (9122) you seem to have used the 
    Table I results for 39 deg North.  Not 40 deg.
    
    Plotting your results from 9122, AP Lat 39 deg N, Long 77 deg 49.6 W, a=21 deg 
    20.0 min - 20 deg 24.3 = 55.7 nm Toward, gives, as expected, the same LOP. 
    (See attached.)
    
    I agree with your most recent. (9124)
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